The Western Digital SN530 is a solid-state drive in the M.2 2230 form factor, launched on January 7th, 2021. It is available in capacities ranging from 256 GB to 1 TB. This page reports specifications for the 256 GB variant. With the rest of the system, the Western Digital SN530 interfaces using a PCI-Express 3.0 x4 connection. The SSD controller is the 20-82-10048-A1 Polaris MP16 from WD, a DRAM cache is not available. Western Digital has installed 96-layer TLC NAND flash on the SN530, the flash chips are made by Toshiba. To improve write speeds, a pseudo-SLC cache is used, so bursts of incoming writes are processed more quickly. The SN530 is rated for sequential read speeds of up to 2,400 MB/s and 900 MB/s write; random IOPS reach up to 170K for reads and 120K for writes.
At its launch, the SSD was priced at 130 USD. The warranty length is set to five years, which is an excellent warranty period. Western Digital guarantees an endurance rating of 200 TBW, a typical value for consumer SSDs.